Home
Class 12
PHYSICS
A current I amperes flows through a loop...

A current `I` amperes flows through a loop abcdefgha along the edge of cube of width `l` metres as shown in figure. One corner 'a' of the loop lies at origin.

The unit vector in the direction of magnetic field at the centre of cube abcdefgh of width `l` is given by

A

`hat(i)`

B

`- hat (j)`

C

`(2 hat(i)-hat(j))/(sqrt(5))`

D

`hat(k)`

Text Solution

Verified by Experts

The correct Answer is:
B
`["Moderate"]` The magnetic field at centre of cube ebode each carrying current I. T the magnetic field at centre of cube is only due to loop fabef. Hence the magnetic field at centre of cube is in negative y-direction.
Promotional Banner

Topper's Solved these Questions

  • DAILY PRACTICE PROBLEM

    RESONANCE|Exercise DPP No.64|20 Videos

  • DAILY PRACTICE PROBLEM

    RESONANCE|Exercise DPP No.65|9 Videos

  • DAILY PRACTICE PROBLEM

    RESONANCE|Exercise DPP No.62|9 Videos

  • CURRENT ELECTRICITY

    RESONANCE|Exercise High Level Problems (HIP)|21 Videos

  • ELECTRO MAGNETIC WAVES

    RESONANCE|Exercise Exercise 3|27 Videos

Similar Questions

Explore conceptually related problems

A current I amperes flows through a loop abcdefgha along the edge of cube of width l metres as shown in figure. One corner 'a' of the loop lies at origin. Now if a uniform external magnetic field is vec(B) = B_(e) hat(j) is switched on, then the unit vector in the direction of torque due to external magnetic field (vec(B)) acting on the current carrying loop (abcdefgha) is

A current I amperes flows through a loop abcdefgha along the edge of cube of width l metres as shown in figure. One corner 'a' of the loop lies at origin. This current path (abcdefgha) can be trated as a superposition of three square loops carrying current I Choose the correct option ?

A current I is flowing through the loop , as shown in the figure . The magnetic field at centre O is

In figure is shown a circular loop carrying current I. Show the direction of the magnetic field with the help of lines of force.

A current of I ampere is flowing through each of the bent wires as shown the magnitude and direction of magnetic field at O is

A square loop of edge 'a' carries a current l. The magnetic field at the centre of loop is